#include "muduo/proto/codec.h"
#include "muduo/proto/dispatcher.h"
#include "muduo/base/Logging.h"
#include "muduo/base/Mutex.h"
#include "muduo/net/EventLoop.h"
#include "muduo/net/TcpServer.h"

#include <string>
#include<unordered_map>
#include "request.pb.h"

class Sever
{
public:
    typedef std::shared_ptr<google::protobuf::Message> MessagePtr;
    typedef std::shared_ptr<sty::TranslateRequest> TranslateRequestPtr;
    typedef std::shared_ptr<sty::AddRequest> AddRequestPtr;
    Sever(int port) : _server(&_baseloop, muduo::net::InetAddress("0.0.0.0", port), "Sever", muduo::net::TcpServer::kReusePort),
                      _dispatcher(std::bind(&Sever::onUnknownMessage, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3)),
                      _codec(std::bind(&ProtobufDispatcher::onProtobufMessage, &_dispatcher, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3))
    {
        //注册业务请求处理函数
        _dispatcher.registerMessageCallback<sty::TranslateRequest>(std::bind(&Sever::onTranslate, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
        _dispatcher.registerMessageCallback<sty::AddRequest>(std::bind(&Sever::onAdd, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
        _server.setMessageCallback(std::bind(&ProtobufCodec::onMessage,&_codec,std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
        _server.setConnectionCallback(std::bind(&Sever::onConnection,this,std::placeholders::_1));
    }
void start()
{
    _server.start();
    _baseloop.loop();
}
private:
        std::string translate(const std::string &str) {
            static std::unordered_map<std::string, std::string> dict_map = {
                {"hello", "你好"},
                {"Hello", "你好"},
                {"你好", "Hello"},
                {"吃了吗", "油泼面"}
            };
            auto it = dict_map.find(str);
            if (it == dict_map.end()) {
                return "没听懂！！";
            }
            return it->second;
        }
    void onTranslate(const muduo::net::TcpConnectionPtr &conn,const TranslateRequestPtr &message,muduo::Timestamp){
        //1.提取message中的有效消息，也就是需要翻译的内容  
        std::string req_msg = message->msg();
        //2.进行翻译得到结果
        std::string rsp_msg = translate(req_msg);
        //3.组织protobuf响应
        sty::TranslateResponse resp;
        resp.set_msg(rsp_msg);
        //4.发送响应
        _codec.send(conn,resp);
    }
    void onAdd(const muduo::net::TcpConnectionPtr &conn,const AddRequestPtr &message,muduo::Timestamp){
        int num1 = message->nums1();
        int num2 = message->nums2();
        int result = num1+num2;
        sty::AddResponse resp;
        resp.set_result(result);
        _codec.send(conn,resp);

    }

    void onUnknownMessage(const muduo::net::TcpConnectionPtr &conn,const MessagePtr &message,muduo::Timestamp){
        LOG_INFO << "onUnknownMessage: " << message->GetTypeName();
        conn->shutdown();
    }
    void onConnection(const muduo::net::TcpConnectionPtr &conn)
    {
        if(conn->connected())
        {
            LOG_INFO <<"服务器新连接建立成功！";
        }else
        {
            LOG_INFO <<"连接即将关闭！";
        }
    }

private:
    muduo::net::EventLoop _baseloop;
    muduo::net::TcpServer _server;  // 服务器对象
    ProtobufDispatcher _dispatcher; // 请求分发器--要向其中注册请求处理函数
    ProtobufCodec _codec;           // protobuf协议处理器--针对收到的请求数据进行protobuf协议处理
};


int main()
{
    Sever sever(8085);
    sever.start();
    
    return 0;
}